Field improvement in a uniaxial centered lens composed of two stacked-volume holographic elements

Partitioned-field holographic lenses composed of three noncentered uniaxial systems

Partitioned-field uniaxial volume holographic lenses increase the image fields of holographic volume lenses that are limited by angular selectivity. The efficiency and aberrations of one of these systems consisting of two overlapping uniaxial noncentered lenses were reported previously [Appl. Opt. 38, 4011 (1999)]. In the present study we present theoretical and experimental extensions of these systems to three overlapping lenses, showing how the dynamic range of the recording material can cause an important decrease in efficiency when several gratings are superposed on the same plate.

Silver halide sensitized gelatin process effects in holographic lenses recorded on Slavich PFG-01 plates

In this work we study the feasibility of using silver halide sensitized gelatin based on PFG-01 (Slavich) emulsions to construct uniaxial compound lenses. This processing is able to introduce variations in the thickness and refractive index of the emulsion. We prove that these changes are not sufficient to provide the observed variations in Bragg conditions in the reconstruction and that a shear-type effect must exist to explain the performance of processed emulsions. We study the characteristics of a compound lens, obtaining acceptable image quality, good resolution, and the typical field limitation of volume holographic elements.

Partitioned-field uniaxial holographic lenses

The efficiency and aberration of partitioned-field uniaxial volume holographic compound lenses are theoretically and experimentally studied. These systems increase the image fields of holographic volume lenses, limited by the angular selectivity that is typical of these elements. At the same time, working with uniaxial systems has led to a decrease in aberration because two recording points (that behave as aberration-free points) are used. The extension of the image field is experimentally proved.

Achromatic fourier processor with holographic optical lenses

An optical Fourier processor that allows the use of broadband light sources and colored inputs is designed, fabricated, and tested. We develop a design technique based on phase manipulation in the Fourier plane to construct an image processor that provides a chromatically corrected image making use of the good aberrations behavior of symmetrical optical systems. Only a small number of diffractive lenses and one achromatic refractive lens are required to obtain a real image. We verify our design experimentally using holographic lenses, which are presented, owing to their versatility, as a good alternative to expensive blazed diffractive elements.